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结合田间调查和室内研究,对2011年在夏玉米上突然暴发的二点委夜蛾的为害特点和暴发原因进行了分析。明确了二点委夜蛾食性多样、兼性腐生、幼嫩组织取食、地表为害、顺垄为害和聚集分布等为害习性。指出了虫源基数大、幼虫盛发期与玉米幼苗期相遇、气象条件和田间小环境适宜是2011年该虫暴发的主要原因。
Based on the field investigation and laboratory studies, the pest damage characteristics and causes of outbreaks of the two members of the armyworm (SP), which suddenly broke out on summer maize in 2011, were analyzed. Clear two point Numinanorchy feed diversity, facultative saprophytic, young tissue feeding, surface damage, Shun ridge damage and aggregation and other harmful habits. Pointed out that the base of insect population, the larvae Shengmai period and maize seedling encounter, meteorological conditions and suitable for the small field environment in 2011 the main cause of the outbreak of the worm.